is it safe to overclock a monitor like a SAMSUNG U28D590D 4K UHD Display 28? how many frames do you think I could get above normal 70hz maybe? or is it even safe to OC a monitors refresh
People do it. It's not worth it to me.
You run a risk of seriously damaging a very expensive monitor for very little return - 70Hz vs 60Hz is not going to be noticeable. In addition, if you do manage to overclock up to 100 or 120, it's going to look a lot worse than a native 120Hz panel will.